Molecular characterization of soil organic carbon in water-stable aggregate fractions during the early pedogenesis from parent material of Mollisols

Li, Na; Long, Jinghong; Han, Xiaofei; Yuan, Yaru

doi:10.1007/s11368-020-02563-w

Cited by 19 publications

(3 citation statements)

References 55 publications

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“…Nitrogen was the most essential nutrition for the straw transformation and decomposition. The cooperative action of N fertilizer and straw addition promotes the growth and reproduction of soil microbial (N. Li et al, 2020; Totsche et al, 2018), and microbial metabolites and residues are important sources of SOC (L. Chen et al, 2019; Liang et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Effects of straw returning and nitrogen addition on soil quality of a coastal saline soil: A field study of four consecutive wheat‐maize cycles

et al. 2023

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The effects of different straw returning and nitrogen addition levels on soil quality are important for proper coastal saline soil remediation. However, relatively little is understood concerning the remediation effects, especially, on long‐term effects and mineral composition and microstructures of coastal saline soil. Two maize/wheat straw returning levels [1.0 × 104 kg ha−1 (2S) and 5.0 × 103 kg ha−1 (S)] and three inorganic nitrogen addition levels [300 kg ha−1 (N2), 150 kg ha−1 (N) and 75 kg ha−1 (N1/2)]—were studied, with 150 kg ha−1 inorganic nitrogen and without straw addition treatment as the control (CK), to elucidate the response of soil physical and chemical properties to the two factors. After four consecutive wheat‐maize cycles, different straw and N fertilizer treatments obviously decreased the salinity contents, increased the total nutrient contents, and optimized the soil structure of the saline soil. The saline soil reclamation effects showed significant distinctions among the different straw and N fertilizer treatments. The 2SN2 treatment displayed the greatest effects in regard to reducing salinity, increasing the total soil nutrient contents and optimizing the soil structure, which resulted in the best remediation effect. Straw returning plays a major role in decreasing soil salinity and enhancing saline soil aggregate formation. N fertilizer addition supplies rich nutrients for straw decomposition, and promotes soil microbial growth and reproduction, which brought about C sequestration in coastal saline soil. During the coastal saline soil remediation process in the Yellow River Delta, it is suggested to prioritize straw returning and moderate N fertilizer addition, and live together with moderate P fertilizer application.

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Section: Discussionmentioning

confidence: 99%

Effects of straw returning and nitrogen addition on soil quality of a coastal saline soil: A field study of four consecutive wheat‐maize cycles

et al. 2023

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“…The subfractions of SOC with varied origin and availability represented different composition and stability of SOM (Li et al., 2020). Similar to the changes of SOC in bulk soil, OC fractions decreased with soil depth and followed nearly the same order of grassland > forestland > cropland in the whole 0–100 cm soil profile.…”

Section: Discussionmentioning

confidence: 99%

“…Soil carbon fractionation protocol can help unveil subtle changes in specific compartments of soil matrix where the overall effect may be hidden when bulk soil is considered (Duval et al., 2018; M. Sheng et al., 2020). Different physical or chemical fractions of SOC represent different source and stability of SOC under different land use patterns (Li et al., 2020). For example, physically isolated density fractions could be used to determine the contributions of labile, predominantly plant‐derived OC (i.e., light fraction carbon [LFC]), and stable, mostly microbially processed OC (i.e., heavy fraction carbon [HFC]) (John et al., 2005).…”

Section: Introductionmentioning

confidence: 99%

Long‐term grassland restoration exerts stronger impacts on the vertical distribution of labile over recalcitrant organic carbon fractions in Mollisols

Hao

Han

et al. 2022

Soil Science Soc of Amer J

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Land use change influences soil organic carbon (SOC) distribution in soil matrix.Conversion of cropland to grassland or forestland has the potential to sequester more carbon and influence the carbon allocation. Soil carbon sequestration happens within different physical and chemical fractions. This study aimed to investigate the vertical distribution of SOC fractions under 29-yr of cropland, grassland, and forestland of a typical Mollisol and to derive specific factors for SOC fraction changes associated with land use conversion. Soil samples within 100 cm soil depth were fractionated by density and humic methods. Biomass of litter residues and plant roots were also measured. Together with plant root biomass, the contents of total SOC and organic carbon (OC) fractions decreased along soil profile under three land uses. At each soil depth, total SOC and OC fractions followed the same order of grassland > forestland > cropland except for higher OC contents in heavy fraction, fulvic acid, and humin in cropland than those in forestland at the 0-10 cm layer. Compared with forestland and cropland, 29-yr grassland exerted stronger effects on the profile distribution of labile OC (water-soluble and light OC fractions) than recalcitrant OC (humic and heavy fractions), significances were observed at 0-80 cm layers for the labile OC and at 0-40 cm layers for the recalcitrant OC (P < .05). Larger root biomass and better soil structure in grassland might facilitate such changes. Grassland restoration, with greater C sequestration potential and larger liable OC contents, may help improve soil quality better than forestland and cropland in this Mollisol region.

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Distribution and biodegradation of nonextractable polycyclic aromatic hydrocarbons in particle-size aggregates of field-contaminated soils

Wei

Cheng

et al. 2023

J Soils Sediments

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Molecular characterization of soil organic carbon in water-stable aggregate fractions during the early pedogenesis from parent material of Mollisols

Cited by 19 publications

References 55 publications

Effects of straw returning and nitrogen addition on soil quality of a coastal saline soil: A field study of four consecutive wheat‐maize cycles

Effects of straw returning and nitrogen addition on soil quality of a coastal saline soil: A field study of four consecutive wheat‐maize cycles

Long‐term grassland restoration exerts stronger impacts on the vertical distribution of labile over recalcitrant organic carbon fractions in Mollisols

Distribution and biodegradation of nonextractable polycyclic aromatic hydrocarbons in particle-size aggregates of field-contaminated soils

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